Update README.md

Author: jdhoek

README.md

@@ -1,11 +1,25 @@
 java-maven-junit-helloworld
 ===========================
 
-A „Hello World!” sample written in Java that showcases very simple unit and integration tests.
+A „Hello World!” sample written in Java using Maven for the build, that showcases a few very simple tests.
+
+This example demonstrates:
+
+* Unit tests written with [JUnit 4](http://junit.org/)
+* Integration tests written with [JUnit 4](http://junit.org/)
+* Using [system-rules](http://www.stefan-birkner.de/system-rules/) to test `System.out` and `System.exit()`
+* Code coverage reports via [Cobertura](http://cobertura.github.io/cobertura/)
+* A Maven build that puts it all together
+
+Running the tests
+-----------------
 
 * To run the unit tests, call `mvn test`
 * To run the integration tests as well, call `mvn verify`
 
+Conventions
+-----------
+
 This example follows the following basic conventions:
 
  | unit tests | integration tests